I remember that 5 month mark with my girls as being a period where they went through a lot of changes, just like yours. There was teething, day care, and they definitely had a growth spurt at that time. I do recall with my youngest that she seemed to be going backwards and getting worse and not better with sleeping! She is 13 months now and has omnly been sleeping consistently through the night for 2 months! Anyway, I agree that she is experiencing a little stress due to those changes, but my advice is to just keep doing what you are doing and be consistent, no matter what. Feed her out of the crib, pat her, and put her right back in. You may need to rub her back or belly a little, talk to her soothingly a little, but just keep letting her know that nighttime is sleeping time. Don't sit with her for a long time because she will get VERY used to that and come to expect it. Don't worry, she will get the message before you know it. Babies go through these stages and changes often, and just when you think it's hopeless, they get better. You just have to be firm yet meet her needs at the time - a delicate balancing act, I know. I do believe with my baby that she really DID need extra food overnight, even at 9 months when she was a big baby! I knew we would not let it go past a year with her waking, and she figured it out right before she turned 1 all on her own. Good luck, I know how tough it is, especially when you are working. I spent this past year in a daze but it's much better now. It does improve!!